The European division of Square-Enix has crypitcally registered the trademark “Heroes of Ruin”, which seems to indicate it’s the title of a project being worked on by Eidos.
What could it be? It could be a new game, a new chapter in an existing IP - Siliconera guesses a new game in the Commandos series called “Commandos: Heroes of Ruin” - or perhaps an expansion to an existing game; it would certainly fit Final Fantasy XIV, considering the state the MMO is in.
Stay tuned.